docs: def nplnpt(linpt, lindir, point):
      """
      Find the nearest point on a line to a specified point,
      and find the distance between the two points.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/nplnpt_c.html
  
      :param linpt: Point on a line
      :type linpt: 3-Element Array of floats
      :param lindir: line's direction vector
      :type lindir: 3-Element Array of floats
      :param point: A second point.
      :type point: 3-Element Array of floats
      :return:
              Nearest point on the line to point,
              Distance between point and pnear
      :rtype: tuple
      """
      linpt = stypes.toDoubleVector(linpt)
      lindir = stypes.toDoubleVector(lindir)
      point = stypes.toDoubleVector(point)
      pnear = stypes.emptyDoubleVector(3)
      dist = ctypes.c_double()
      libspice.nplnpt_c(linpt, lindir, point, pnear, ctypes.byref(dist))
      return stypes.cVectorToPython(pnear), dist.value